/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 * 
 *      http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.apache.jasper.compiler;

import java.io.IOException;
import java.net.JarURLConnection;
import java.net.MalformedURLException;
import java.net.URL;
import java.util.jar.JarFile;

public class JarURLResource implements JarResource {

	private String jarUrl;

	public JarURLResource(URL jarURL) {
		this(jarURL.toExternalForm());
	}

	public JarURLResource(String jarUrl) {
		this.jarUrl = jarUrl;
	}

	@Override
	public JarFile getJarFile() throws IOException {
		URL jarFileUrl = new URL("jar:" + jarUrl + "!/");
		JarURLConnection conn = (JarURLConnection) jarFileUrl.openConnection();
		conn.setUseCaches(false);
		conn.connect();
		return conn.getJarFile();
	}

	@Override
	public String getUrl() {
		return jarUrl;
	}

	@Override
	public URL getEntry(String name) {
		try {
			return new URL("jar:" + jarUrl + "!/" + name);
		} catch (MalformedURLException e) {
			throw new RuntimeException("", e);
		}
	}
}
